How to get rid of grey background in reply box?

in my reply box on the comment sections, the background is grey. Whenever somebody replies to a comment previously submitted, their comments background is a light grey color. How do I fix this?

Site it occurs on: http://www.101baseballnews.com

This is all the code I could find that mentions "reply" in it, but possibly there's another way to fix it.

Thanks!

 

Just add this somewhere in your CSS:

#comments-block {background:#COLOR HERE !important}